Thank you for reading numerical heat transfer and fluid flow. Maybe you have knowledge that, people have search numerous times for their favorite books like this numerical heat transfer and fluid flow, but end up in infectious downloads. Rather than reading a good book with a cup of coffee in the afternoon, instead they cope with some malicious virus inside their computer. numerical heat transfer and fluid flow is available in our digital library an online access to it is set as public so you can get it instantly. Our books collection spans in multiple countries, allowing you to get the most less latency time to download any of our books like this one. Merely said, the numerical heat transfer and fluid flow is universally compatible with any devices to read.

Numerical Heat Transfer And Fluid Flow

https://pure.hw.ac.uk/ws/files/25140027/Zhao_Ning_Zou_BreakWater_WEC_Review_FinalAccepted_OE2019.pdf

Hybrid floating breakwater-WEC system: A review

Numerical simulation of flip-through impacts of variable steepness on a vertical breakwater

Accurate wave runup estimations are of great interest for coastal risk assessment and engineering design. Phase-resolving depth-integrated numerical models offer a promising alternative to commonly used empirical formulae at relatively low computational cost. Several operational models are currently freely available and have been extensively used in recent years for the computation of nearshore wave transformations and runup. However, recommendations for best practices on how to correctly utilize these models in computations of runup processes are still sparse. In this work, the Boussinesq-type model BOSZ is applied to calculate runup from irregular waves on intermediate and reflective beaches. The results are compared to an extensive laboratory data set of LiDAR measurements from wave transformation and shoreline elevation oscillations. The physical processes within the surf and swash zones such as the transfer from gravity to infragravity energy and dissipation are accurately accounted for. In addition, time series of the shoreline oscillations are well captured by the model. Comparisons of statistical values such as R2% show relative errors of less than 6%. The sensitivity of the results to various model parameters is investigated to allow for recommendations of best practices for modeling runup with phase-resolving depth-integrated models. While the breaking index is not found to be a key parameter for the examined cases, the grid size and the threshold depth, at which the runup is computed, are found to have significant influence on the results. The use of a time series, which includes both amplitude and phase information, is required for an accurate modeling of swash processes, as shown by computations with different sets of random waves, displaying a high variability and decreasing the agreement between the experiment and the model results substantially. The infragravity swash SIG is found to be sensitive to the initial phase distribution, likely because it is related to the short wave envelope.

https://www.mdpi.com/2077-1312/8/12/993/pdf

Estimation of Irregular Wave Runup on Intermediate and Reflective Beaches Using a Phase-Resolving Numerical Model

A novel concept of a hybrid floating breakwater-windbreak structure is proposed to shield vulnerable coastal regions from both extreme wave and wind loads in storms. A porous design was adopted for the breakwater part of the structure with the view to improving its hydrodynamic performance. The porosity was achieved by having horizontal internal water channels in the breakwater for free passage of water through the breakwater body. The wave response of such a floating structure is first investigated by analytical solution and then partially compared with laboratory model tests. A CFD analysis was performed to investigate the sidewall effects in the model tests. The horizontal wave forces and wave elevations in the vicinity of the floating breakwater with and without internal water channels were measured experimentally and compared so as to assess the effect of the water channels. The results show that the water channels help to reduce the lateral wave excitation force which is advantageous to breakwaters held in position by mooring dolphins/caissons. At the same time, the floating breakwater efficiency was maintained since the porosity did not increase in the wave transmission coefficient.

Hydrodynamics study on rectangular porous breakwater with horizontal internal water channels

Two validation cases of the Navier-Stokes VOF (Volume-Of-Fluid) model THETIS are presented in this study: uplift pressures on a rubble mound due to wave impacts and flip-through impacts on a vertical wall. The first validation case demonstrates the ability of the model to reproduce uplift pressure overall variations due to wave impacts inside a porous rubble mound. The presence of a marked pressure peak in the porous medium is also stressed. Then, the flip-through phenomenon is modeled using the THETIS model. These results are compared with other numerical data computed with a potential model. The Navier-Stokes simulations which take into account water and air, underestimate pressures along the wall. The wave interface is modified by the presence of air, which is not considered in the potential model, and this seems to be enough to generate such pressure differences. A better agreement between the two models is obtained while lowering the surrounding gas density to almost zero.

https://www.tandfonline.com/doi/pdf/10.1051/lhb/2017044

Validation of a Navier-Stokes model to study flip-through impacts on a composite breakwater

Tsunami waves are often very energetic and therefore pose a significant threat to coastal structures. However, most coastal defenses such as detached breakwaters are designed to protect ag...

/pdf/tsunami-impact-on-a-detached-breakwater-insights-from-two-1ek7dinxn2.pdf

M. Martin-Medina

Papers

Numerical simulation of flip-through impacts of variable steepness on a vertical breakwater

Validation of a Navier-Stokes model to study flip-through impacts on a composite breakwater

Tsunami Impact on a Detached Breakwater: Insights from Two Numerical Models